Republican U.S. Sen. Scott Brown on Friday released a new television ad focused on a bill he co-authored ending insider trading by members of Congress.

President Obama signed the Stop Trading on Congressional Knowledge Act, or STOCK Act, into law in April. Several similar bills had been introduced before, starting in 2006, but never got passed. The bill gained momentum this year after a 60 Minutes report exposed instances of what appeared to be members of Congress trading based on their political knowledge. A version of the bill, sponsored by Connecticut Sen. Joe Lieberman, passed the Senate 96-3.

The ad touts Brown’s role in getting the bill passed. “For me, it's pretty simple,” Brown says in the ad. “The politicians? They should live by the same laws as everyone else."

Brown has stressed his bipartisan credentials in his tight race against Democrat Elizabeth Warren. The ad continues on that theme, showing a clip of Democratic President Barack Obama shaking Brown’s hand and telling him “good job” at the bill signing. Obama is popular in Massachusetts and Warren, who spoke at the Democratic National Convention this week, previously ran her own ads featuring the president.

The ad will begin airing Saturday in the Boston, Springfield, Providence and Albany markets and on statewide cable.